Agfdhyk

js and in learning phase. I tried to create a new user by saving it into database using mongodb. But when i tried to post the data using POSTMAN, I am getting the following error:

Could not get any response. There was an error connecting to http://localhost:3000/create-user

Nodemon also crashed showing [nodemon] app crashed - waiting for file changes before starting...

I manually run the file and checked but when I tried to post data, connection got lost and terminated.

Below is the server.js file:

const express = require('express');

const morgan = require('morgan');

const mongoose = require('mongoose');



var User = require('./models/user');



const app = express();



mongoose.connect('mongodb://test:check123@ds211694.mlab.com:11694/parpet',  { useNewUrlParser: true }, (err) => {

    if(err) {

        console.log(err);

    } else {

        console.log('Connected Successfully');

    }

})

// Middleware for log data

app.use(morgan('dev'));

app.use(express.json());

app.use(express.urlencoded({ extended: false }));



app.post('/create-user', (req, res) => {

    var user = new User();

    user.profile.name = req.body.name;

    user.email = req.body.email;

    user.password = req.body.password;

    user.save(function (err) {

        console.log('checking.....');

        if(err) {

            console.log('Error');

        } else {

            res.json('Successfully created a new user');

        }

    });

});



const port = process.env.PORT  || 3000;



app.listen(port, (err) => {

    if(err) throw err;

    console.log(`Server listening on port ${port}`);

});

And the model file is

const mongoose = require('mongoose');

const bcrypt = require('bcrypt');



var Schema = mongoose.Schema;



/* Creating User Schema */

var UserSchema = new Schema({

    email: {

        type: String,

        unique: true,

        lowercase: true

    },

    password: String,

    profile: {

        name: {

            type: String,

            default: ''

        },

        picture: {

            type: String,

            default: ''

        }

    },

    address: String,

    history: [{

        date: Date,

        paid: {

            type: Number,

            default: 0

        },

        // item: 

    }]

});



/* Hash the password */

UserSchema.pre('save', function (next) {

    var user = this;

    if(!user.isModified('password')) {

        return next();

    }

    bcrypt.genSalt(10, function (err, salt) {

        if(err) return next(err);

        bcrypt.hash(user.password, salt, null, function (err, hash) {

            if(err) return next(err);

            user.password = hash;

            next();

        });

    });

});



/* Comparing typed password with that in DB */

UserSchema.methods.comparePassword = function (password) {

    return bcrypt.compareSync(password, this.password);

}



module.exports = mongoose.model('User', UserSchema);

I tried disabling ssl connections as posted in other stackoverflow questions, but this was not helpful.

So can someone please help me to figure it out. It would be really helpful.

node --version    = v8.9.3

npm --version     = 6.4.1

nodemon --version = 1.17.5

express --version = 4.16.0

Thanks

It looks like this call to bcrypt is quietly crashing:

bcrypt.hash(user.password, salt, null, function (err, hash) {

I am not sure where the null parameter came from. If you remove it:

bcrypt.hash(user.password, salt, function (err, hash) {

It no longer crashes, and returns no error.

I was facing the same issue, got it resolved by downgrading the bcrypt package to 2.0.1.